<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>404 访问出错 - ByUsi短链服务</title>
    <link href="/static/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
    {% include 'navbar.html' %}
    
    <div class="container text-center py-5">
        <h1 class="display-1 text-danger">404</h1>
        <h2 class="mb-4">404</h2>
        <p class="lead">该界面不存在。</p>
        <a href="{{ url_for('index') }}" class="btn btn-primary">返回首页</a>
    </div>
    
    <script src="/static/js/bootstrap.bundle.min.js"></script>
</body>
</html>